Want to see the guts of a Cocoa program? Learn how to accomplish these programming tasks:

Services: Allows GIFfun to be automatically launched and operatedDrag & Drop: The power of Cocoa is in Drag & DropNSTableView: Learn to use tableViews that have images in themHTML: Build HTML on the fly and open it in another ApplicationSDTableView: Subclass NSTableView to allow drag reordering of rowsNSBitmapImage: Learn how to create GIF's from any NSImageUnix Wrapper: How to integrate command line tools into an AppPreferences: Save the users preferences and isolate in a moduleArchiving: See how copy files and save/read dictionariesDirectory Creation: cloneable code to test and create directory treesYellow Box: Build on Windows, MACH or Cocoa OS X